| Title |
A Study on the Reduction of Total Phosphate of the Concerned Pollution Area in the Main Stream of Mangyeong River |
| Authors |
최정화 ( Jounghwa Choi ) ; 권재옥 ( Jaeog Kwon ) ; 이미선 ( Miseon Lee ) ; 장욱 ( Wook Jang ) ; 최근화 ( Geunhwa Choi ) ; 고은혜 ( Eunhye Ko ) ; 심서현 ( Seohyeon Sim ) ; 조창우 ( Changwoo Cho ) |
| DOI |
https://doi.org/10.15681/KSWE.2022.38.6.316 |
| Keywords |
Agricultural season; Non-point pollution source; Pollution contribution rate; Stormwater pipeline; Total phosphate (TP) |
| Abstract |
This study aimed to investigate the causes of the increasing Total Phosphate(TP) in the mainstream of Mangyeong river over the past 10 years, and suggested a reduction plan of about 3 points. First, the high TP concentration was continuously released in the discharge outlet of the Haepo bridge stormwater pipeline. The average TP concentration was 5.066 mg/L and values as high as 29.470 mg/L were measured. The highest pollution contribution rate to the Mangyeong river was more than 70 %. The cause of the pollution was expected to take place somewhere in Wanju Industrial Complex. Second, the average TP concentration of wastewater-treated effluent in the H factory was 0.405 mg/L. If a TP reduction facility is additionally installed in the H factory, it will help reduce TP uptake by Lake Saemangeum. Third, the TP concentration of untreated non-point source point flowing into the Samrae stream was very high with an average of 2.828 mg/L. Also, the pollution contribution rate of Samraecheon 2 to Mangyeong river was 21.8 % on average and up to 58 %. The pollution contribution rate was also high during the agricultural season and the winter, during which the flow rate is decreased. Investigation of these three points may be continuously needed, and analysis results and policy proposals presented to Jeollabukdo and Wanjugun to manage pollution sources. |